Abstract Bleaching of unbleached and oxygen delignified pulps from nineteen non-wood plants has been evaluated in elemental chlorine free bleaching. Chlorine dioxide charge (kappa factor 0.15, 0.20 and 0.25) and temperature (70 and 85 °C) in the delignification stage (D) were varied. Chlorine dioxide (ClO2) charge and temperature exhibited lower kappa number and higher brightness after alkaline extraction (EP) stage. High temperature ClO2 delignification (DHT) exhibited higher final pulp brightness. The final brightness of wheat straw pulp reached to 90 % after D0/DHT(EP)D1 bleaching, while banana pseudo stem pulp showed the worst bleachability. Residual hexeneuronic acid contents in final pulp from most of the non-wood plants were lower and exhibited 1–2 % higher pulp brightness in DHT process than D0 process. Oxygen delignified pulp and DHT process discharged lower COD load.

中文翻译：

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十九种非木材植物纸浆的二氧化氯漂白

摘要 在无元素氯漂白中对来自 19 种非木材植物的未漂白和氧脱木素纸浆的漂白进行了评估。去木质素阶段 (D) 中的二氧化氯装料（kappa 因子 0.15、0.20 和 0.25）和温度（70 和 85 °C）是不同的。二氧化氯 (ClO2) 电荷和温度在碱萃取 (EP) 阶段后表现出较低的卡伯值和较高的亮度。高温二氧化氯脱木素 (DHT) 显示出更高的最终纸浆白度。D0/DHT(EP)D1漂白后麦草浆的最终白度达到90%，而香蕉假茎浆的漂白性最差。大多数非木材植物的最终纸浆中残留的己神经醛酸含量较低，在 DHT 工艺中纸浆白度比 D0 工艺高 1-2%。